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(No ModeL) G. B. GOWLES.

MIORTISE LOCK.

No. 323,564. Patented Aug. 4. 1885.

IlNiTEn STATES arena" @rrrcn.

GEORGE E. COXVLES, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE CORBINCABINET LOCK COMPANY, OF SAME PLACE.

MO RTlSE-LOCK.

PEEPEGIFICATION forming part of Letters Patent No. 323,564, dated August4-, 1885.

To aZZ whom it may concern.-

Be it known that I, Gnonen B. OowLEs, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMortise Locks, of which the following is a specification.

My invention relates to improvements in that class of mortise-lockswhich have overhanging side walls and are secured in place by being letinto a routed cavity having overhanging side walls. secured the upperend of the lock is held in place mainly by the selvage. When thewood inthe drawer rail or front shrinks so much that its upper edge is belowthe selvage,there is nothing to hold the upper part of the lock inplace. Even ifthe wood shrinks only adistance equal to a part of thethickness of the selvage, the latter is so thin that pulling upon thedrawer when it is locked will cause the selvage to cut its way out ofthe mortise and let the lock bend or fall back into the drawer, so thatthe drawer can be opened without \vitlr drawing the lock-bolt into itscase.

The object of my invention is to more firmly secure these locks inplace. My invention is particularly designed for loclccases whose capdoes not extend upward to the selvage.

In the accompanying drawings, Figure 1 is a plan view of my lock. Fig. 2is a rear elevation. Fig. 3 is a vertical section on line mu of Fig. 2,together with a portion of the drawer rail or front. Fig. 4 is adetached plan view of my re-enforce selvage, and Fig. 5 is a verticalsection of the upper portion of my lock on line 3 3 of Fig. 1.

The main portion of the lock is the same as in ordinary locks of thisclass,and need not be particularly described.

A designates the cap of the lock-case, B the lock-plate, and C theselvage. I add to these parts what I term a re-enforce or reserveselvage, O. This in plan view is of the same contour as the selvageproper, and at the edge which faces the lock-plate B, I

In this class of locks thus (No modeli form two projecting lugs, a a,Figs. 4 and 5. Said lugs are also indicated by broken lines in Fig. 1. Ialso prefer to form an upwardlyprojecting flange, b, on the rear edge ofthis 0 re-enforce selvage, the upper edge of which flange is designed tobear upon the under side of the selvage proper, G. Holes are made in thelock-plate at the proper point to receive the lugs a a, and the ends ofsaid lugs are headed down to hold the re-enforce selvage C in place inthe position illustrated.

It is not necessaryin my invention to fasten the re-enforce selvage withlugs through the plate proper, as the only essential requisite is thatsaid re-enforce selvage shall be by some means secured firmly to thelook-plate in the sense that the re-enforce selvage will hold the lockplate and case within the routed cavity.

By my improvement, whenever. the wood of the drawer-rail D shrinks sothat its upper edge is below or nearly below the edge of the selvage G,the dovetailed mortise will still embrace the re-enforce selvage, which,being thus held in reserve, will securely hold the upper end of thelook-case firmly in its inortise, so that it cannot be pulled out. Saidreenforce selvage at all times, whether the drawer rail shrinks or not,will maintain its hold in the mortise or routed cavity, and materiallyadd to the strength by which the lock is secured in place. In order toaccomplish this object, it must be firmly attached to the lock, and at apoint below the selvage G greater than the probable shrinkage of thewood with reference to the depth of the mortise.

I claim as myinvention- Th e herein described lock-case, havingoverhanging side edges which adapt the case to be secured within arouted cavity, and having a 8 5 re-enforce or reserve selvage firmlysecured to said lock-case, substantially as described and for thepurpose specified.

GEORGE E. COIVLES. lVitnesses:

G130. \V. GORBIN, S. O. DUNHAM.

